[Python-bugs-list] [ python-Bugs-476593 ] Bad mode for opening file gives bad msg.

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Bugs item #476593, was opened at 2001-10-30 17:27
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Category: Python Interpreter Core
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Gregory H. Ball (greg_ball)
>Assigned to: Jeremy Hylton (jhylton)
Summary: Bad mode for opening file gives bad msg.

Initial Comment:
Calling the open (or file) builtin with an incorrect
mode 
(for example, 'bw' or 's')  causes an exception which
claims that the filename is invalid.

>>> open('tmp','s')

Traceback (innermost last):

File "<stdin>", line 1, in ?

IOError: [Errno 22] Invalid argument: 'tmp'


(double spaced in hopes of preserving line breaks)


It comes down to this call:

PyErr_SetFromErrnoWithFilename(PyExc_IOError, name);

which assumes that the filename is relevant to any
IOError
that pops up.  

man fopen on linux says:

EINVAL The mode provided to fopen, fdopen, or freopen 
was
              invalid.

so it seems possible to catch this case, but not
without making the code more complex.



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